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6.1.3
Burner (dis)assembly
•
Turn off the gas supply to the control valve
•
Remove the glass and grid
•
Detach the gas connection
•
Unscrew the two screws under the burner assembly and remove it from the
combustion chamber (see figure 7)
•
The pilot can be removed by removing the screw in the centre of the pilot
•
Replace parts as necessary and re-assemble
6.2
Combustion test
A BS7967 combustion analysis check should be carried out using an analyser to
MantleBS7927 positioned in the outlet.
The performance of the appliance should be checked
6.2.1
Procedure for performance test
Ignite the fire and run at FULL for a minimum of 15 minutes
Record the Carbon Dioxide (CO2) reading at the outlet, most analysers will display this as a
percentage (%)
Repeat test for Carbon Monoxide (CO), this will be measured in Parts Per Million (ppm);
Calculate the combustion ratio (CO/CO2).
This combustion ratio of the emitted gasses should not exceed 0.0015
Ratio = CO (ppm) _
CO2 (%) x 1000
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